CN218579657U - Production device of N2 and CO2 mixed gas - Google Patents
Production device of N2 and CO2 mixed gas Download PDFInfo
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- CN218579657U CN218579657U CN202222800061.9U CN202222800061U CN218579657U CN 218579657 U CN218579657 U CN 218579657U CN 202222800061 U CN202222800061 U CN 202222800061U CN 218579657 U CN218579657 U CN 218579657U
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Abstract
The utility model provides a N 2 、CO 2 The mixed gas production device comprises a combustion furnace, an igniter, a fuel bin, a metering pump, a mixing spray pipe, a combustion gas exhaust pipeline, a combustion gas recovery fan, a controller, a first cooler, a second cooler, a temperature sensor and a dust remover; the igniter is arranged at the bottom of the interior of the combustion furnace, the first cooler is arranged at the upper part of the interior of the combustion furnace, and the temperature sensor is arranged in the interior of the combustion furnace; the mixing spray pipe is introduced into an igniter inside the combustion furnace, the mixing spray pipe is externally connected with the atmosphere, and the fuel bin is connected to the mixing spray pipe through a metering pump; the top of firing burning furnace communicates combustion gas exhaust pipe, and combustion gas exhaust pipe communicates the dust remover import, and the exit linkage second cooler's of dust remover import, second cooler exit linkage combustion gas recovery fan. The N is 2 、CO 2 The heating temperature of the mixed gas production device is controllable, the generation of harmful gases of nitrogen oxides is reduced, and the purity of the produced gas is improved.
Description
Technical Field
The utility model relates to a grain storage air conditioning technical field, specific theory has related to a N 2 、CO 2 Production device of mixed gas.
Background
With the improvement of the living standard of people at present, the requirements on the safety and the taste of food are higher and higher.
Most of the traditional grain storage is conventional storage, grain pests can occur to the conventionally stored grains, the grain safe storage and the grain quality are greatly influenced, and even huge economic loss can be caused, so that most of the grains need to use Phosphine (PH) after the temperature rises to the end of spring every year 3 ) The gas insecticide fumigates and kills insects, which can cause certain pollution to grains, the phosphine is generated by deliquescence of aluminum phosphide (AlP), the deliquescence of the aluminum phosphide can generate medicine dregs, and the medicine dregs and the air dissipation can cause pollution to the environment.
In order to overcome the defects of conventional grain storage and meet the requirements of people on food safety, low-temperature and air-conditioned storage has been developed in part of grain depots, and the low-temperature storage and the air-conditioned storage have the characteristics respectively.
The modified atmosphere storage is that nitrogen or carbon dioxide is used for completely or partially replacing air in grain piles, an anoxic environment is provided for grains, pests are anoxic or killed by carbon dioxide poison, the growth of aerobic microorganisms such as mold can be inhibited, the life intensity of the grains is inhibited, the deterioration speed of the grains is delayed, and pesticides are not used for killing insects. At present, two gases are used as gases for controlled atmosphere storage, namely high-purity N 2 One is CO 2 。
Currently by N 2 The air conditioning utilization rate is higher because of N 2 Can use air as raw material and utilize molecular sieve pressure-swing adsorption method to separate out high-concentration N 2 Displacing air, N, in the grain bulk 2 When the concentration reaches 98 percent, the treatment can be carried outCan inhibit the growth of aerobic microorganisms such as mould, inhibit the life intensity of grains, delay the deterioration speed of the grains, cause the anoxic death of pests and avoid using insecticides for killing insects, and has the defect that the investment of nitrogen making equipment is too large due to the N 2 Has no toxic and harmful effect on pests and N 2 The concentration requirement is more than 98 percent, and the operation cost is higher.
The second is the utilization of CO 2 As a gas-conditioned storage gas, CO 2 Has toxic effect on pests, can kill pests in a short time when the concentration reaches 40%, has lethal effect on pests when the concentration reaches 20%, and has lethal effect on CO 2 Concentration requirement is not strict, but CO 2 Not easy to prepare on site, transporting CO in large quantities 2 The cost is also high.
Although there is the combustion oxygen reduction machine at present, use coke charcoal piece as deoxidier combustion oxygen reduction, because the burning speed of carbon piece is slow, need great equipment, the proportion of carbon and air can't accurate control in the burning of carbon piece, the combustion gas oxygen content is high, can't satisfy the storage technology demand of gas conditioning and do not control the combustion temperature, the coke combustion temperature reaches more than 1400 ℃, produce a large amount of nitrogen oxide easily, make the combustion gas contain a large amount of nitrogen oxide and pollute grain, contain a small amount of elemental sulfur in the coke, can produce sulfur dioxide gas after the burning, also cause the pollution to grain. Due to the reasons, the prior combustion oxygen reduction furnace cannot be popularized and applied.
In order to solve the above problems, people are always seeking an ideal technical solution.
Disclosure of Invention
The utility model aims at the defects of the prior art, thereby providing a N which can control the combustion temperature within 1000 ℃, fully reduce the oxygen content and carry out the desulfurization treatment 2 、CO 2 Production device of mixed gas.
In order to realize the purpose, the utility model discloses the technical scheme who adopts is: n 2 、CO 2 The mixed gas producing apparatus includes combustion furnace, igniter, fuel bin, metering pump, mixing nozzle, combustion gas exhaust pipeline, combustion gas recovering fan and controllerThe first cooler, the second cooler, the temperature sensor and the dust remover;
the igniter is arranged at the bottom of the interior of the combustion furnace, the first cooler is arranged at the upper part of the interior of the combustion furnace, and the temperature sensor is arranged in the interior of the combustion furnace;
the mixing spray pipe is introduced into an igniter inside the combustion furnace, the mixing spray pipe is externally connected with the atmosphere, and the fuel bin is connected to the mixing spray pipe through a metering pump;
the top of the combustion furnace is communicated with a combustion gas exhaust pipeline, the combustion gas exhaust pipeline is communicated with an inlet of a dust remover, an outlet of the dust remover is connected with an inlet of a second cooler, and an outlet of the second cooler is connected with a combustion gas recovery fan;
the temperature sensor, the metering pump, the combustion gas recovery fan and the igniter are controlled by the controller to operate.
Basically, the lower part of the combustion furnace is also communicated with an air return pipeline, a combustion gas one-way feedback fan is arranged on the air return pipeline, and the far end of the air return pipeline is communicated with the combustion gas recovery fan.
Basically, install oxygen concentration sensor on the combustion gas exhaust pipe, oxygen concentration sensor connection controller.
Basically, a cooling water jacket surrounds the combustion furnace.
Basically, the dust remover is a cyclone dust remover.
Basically, the first cooler is a cooling water tray distributed in a multi-pipe shape.
Basically, the second cooler is an air-cooled heat exchanger or a spray cooler and comprises cooling pipelines and radiating fins which are distributed in a multi-pipe shape.
Based on the above, the number of the temperature sensors is at least two.
Basically, the fuel in the fuel bin is coke powder or carbon powder.
And a calcium carbonate desulfurizing agent bin communicated with the fuel bin is further arranged.
The utility model discloses relative prior art has substantive characteristics and progress, specific theory, the utility model has the advantages of it is following:
1. the quantity of the air entering is controlled by the negative pressure generated by the combustion gas recovery fan, the quantity of the fuel entering is controlled by the metering pump, the combustion state can be controlled, the combustion temperature is further controlled, meanwhile, the reasonable proportioning of the fuel and the air can be realized, the fuel is fully combusted, and the oxygen content is reduced;
2. in order to further enhance the effect of oxygen reduction and temperature control, a combustion gas one-way feedback fan is connected to one side of the combustion furnace, and the combustion gas subjected to temperature reduction treatment is introduced into the combustion furnace again to reduce the combustion temperature to be within 1000 ℃;
3. an oxygen concentration sensor is added for detecting the oxygen content in the combustion gas, so that the proportion of carbon powder and air is controlled, oxygen can be fully combusted, and the oxygen content is reduced;
4. adding a sulfur removal agent calcium carbonate powder, and reacting sulfur dioxide generated by combustion with calcium carbonate to generate calcium sulfate and carbon dioxide, so as to realize sulfur removal operation and improve the purity of combustion gas;
5. finally obtaining unreacted N 2 Carbon and oxygen to form CO 2 Carbon monoxide CO formed by incomplete combustion and a small amount of unreacted O 2 After cooling, dust removal, heat dissipation and temperature reduction, the combustion gas is pumped out by a combustion gas recovery fan and stored or directly input into a granary to be used as gas conditioning gas for standby.
Drawings
FIG. 1 shows N in example 1 of the present invention 2 、CO 2 The structure of the mixed gas production device is shown schematically.
FIG. 2 shows embodiment 2, N 2 、CO 2 The structure of the mixed gas production device is shown schematically.
FIG. 3 shows N in embodiment 3 of the present invention 2 、CO 2 The structure of the mixed gas production device is shown schematically.
In the figure: 1. a combustion furnace; 2. an igniter; 3. a fuel bunker; 4. a metering pump; 5. a mixing nozzle; 6. a burner exhaust duct; 7. a combustion gas recovery fan; 8. a controller; 9. a first cooler; 10. a second cooler; 11. a temperature sensor; 12. a dust remover; 14. an oxygen concentration sensor; 15. a return air duct; 16. the combustion gas is fed back to the fan in a one-way mode; 17. and a cooling water jacket.
Detailed Description
The technical solution of the present invention is further described in detail through the following embodiments.
Example 1
As shown in FIG. 1, a is N 2 、CO 2 The mixed gas production device comprises a combustion furnace 1, an igniter 2, a fuel bin 3, a metering pump 4, a mixing spray pipe 5, a combustion gas exhaust pipeline 6, a combustion gas recovery fan 7, a controller 8, a first cooler 9, a second cooler 10, a temperature sensor 11 and a dust remover 12, wherein the first cooler 9 adopts a cooling water tray distributed in a multi-pipe shape; the second cooler 10 adopts an air-cooled heat exchanger or a spray cooler and comprises cooling pipelines and radiating fins which are distributed in a multi-pipe shape; the number of the temperature sensors 11 is at least two.
The igniter 2 is disposed at the inner bottom of the combustion furnace 1, the first cooler 9 is disposed at the inner upper portion of the combustion furnace 1, and the temperature sensor 11 is disposed inside the combustion furnace 1.
The mixing spray pipe 5 is introduced into an igniter 2 in the combustion furnace 1, the mixing spray pipe 5 is externally connected with the atmosphere, and the fuel bin 3 is connected to the mixing spray pipe 5 through a metering pump 4.
The top of the combustion furnace 1 is communicated with a combustion gas exhaust pipeline 13, the combustion gas exhaust pipeline 13 is communicated with an inlet of a dust remover 12, an outlet of the dust remover 12 is connected with an inlet of a second cooler 10, and an outlet of the second cooler 10 is connected with a combustion gas recovery fan 7.
And the temperature sensor 11, the metering pump 4, the combustion gas recovery fan 7 and the igniter 2 are controlled by a controller to operate.
The working principle is as follows:
loading carbon powder mixed with a small amount of calcium carbonate powder as a desulfurizing agent into a fuel bin 3, switching on a power supply of an igniter 2, and starting a metering pump 4 to pump when the igniter is heated to 800 DEG CCarbon powder is added into the mixing spray pipe 5, the combustion gas recovery fan 7 is started simultaneously, negative pressure is formed in the combustion furnace 1 through suction force, air carrying carbon powder is sprayed to the igniter 2 through the mixing spray pipe 5 after being mixed, and carbon powder is combusted to generate CO 2 。
If a small amount of sulfur element exists in the carbon powder, the sulfur element can be oxidized into sulfur dioxide by oxygen, therefore, a small amount of calcium carbonate powder serving as a desulfurizing agent can be added into the fuel bin 3 and enters the combustion furnace together with the carbon powder, the sulfur dioxide reacts with the calcium carbonate to generate calcium sulfate and carbon dioxide, and the sulfur element is removed.
In a preferred embodiment, a calcium carbonate desulfurizing agent bin communicated with the fuel bin is further arranged and is dynamically added at any time.
After combustion, the composition of the combustion gas is as follows: unreacted N 2 Carbon and oxygen to form CO 2 Carbon monoxide CO formed by incomplete combustion and a small amount of unreacted O 2 The combustion gas is cooled by the first cooler 9, dedusted by the deduster 12 and cooled by the second cooler 10, and then is pumped out by the combustion gas recovery fan 7 for storage or directly input into the granary as the modified atmosphere gas for standby.
Wherein, regarding the control of the temperature in the combustion furnace, the temperature can be adjusted by controlling the flow rate of the first cooler 9, and the combustion temperature is kept not to exceed 1000 ℃.
In order to promote the deoxidization effect, install oxygen concentration sensor 14 on combustion gas exhaust pipe 13, oxygen concentration sensor 14 connection director 8, oxygen concentration sensor 14 detects the oxygen content in the combustion gas, then controls the measuring pump through controller 8, controls the carbon dust volume of mending as far as possible, makes their proportion adaptation.
Example 2
As shown in fig. 2, the main difference between this embodiment and embodiment 1 is: the lower part of the combustion furnace 1 is also communicated with an air return pipeline 15, a combustion gas one-way feedback fan 16 is arranged on the air return pipeline 15, and the far end of the air return pipeline 15 is communicated with the combustion gas recovery fan 7.
In this embodiment, the means of reducing the temperature of oxygen mainly relies on the return air duct 15, and the combustion gas after being cooled is fed back to the combustion furnace, so that a small amount of oxygen contained in the gas can be further fully combusted while the temperature of the combustion furnace is reduced, and the oxygen content is reduced.
Therefore, in this embodiment, the fuel can be coke powder, and the ratio of the coke powder to air is controlled by the metering pump to be 1Kg coke powder to 8.88m 3 Air.
The working principle is as follows:
combustion of coke powder to CO 2 The reaction of trace sulfur with oxygen to produce sulfur dioxide, and the reaction of sulfur dioxide with calcium carbonate as desulfurizing agent to produce calcium sulfate and CO 2 . When the temperature sensor 11 detects that the temperature in the combustion furnace 1 reaches or exceeds 1000 ℃ during combustion, the combustion gas one-way feedback fan 16 is started, cooled combustion gas is injected into the combustion furnace 1, the temperature of the combustion chamber is controlled not to exceed 1000 ℃, so that the generation of nitrogen oxides is reduced, and the pollution to grains and the environment is avoided. When the combustion gas one-way feedback fan 16 does not operate, the combustion gas cannot flow from the combustion chamber to the combustion gas recovery fan 7 due to the one-way effect.
The components of the generated combustion gas are as follows: n not taking part in the reaction 2 Carbon and oxygen to form CO 2 Carbon monoxide CO formed by incomplete combustion and a small amount of unreacted O 2 The combustion gas is cooled by the first cooler 9, dedusted by the deduster 12 and cooled by the second cooler 10, and then is pumped out by the combustion gas recovery fan 7 for storage or directly input into a granary to be used as the modified atmosphere gas for standby.
Example 3
As shown in fig. 3, the present embodiment is different from embodiment 1 or 2 in that: the combustion furnace 1 is surrounded by a cooling water jacket 17, and the cooling measures of the combustion furnace depend on the cooling water jacket 17, and meanwhile, the outer wall of the combustion furnace 1 can be prevented from being overheated.
The utility model has simple structure and low investment, and the produced mixed gas contains O 2 The residue is less, the harmful gas is trace, the raw materials are easy to obtain, the method can be used for field production, the operation cost is low, and the method can completely meet the requirement of controlled atmosphere storage of grains.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the technical solution of the present invention, the present invention should be covered by the technical solution of the present invention.
Claims (10)
1. N 2 、CO 2 The production device of the mixed gas is characterized in that: the device comprises a combustion furnace, an igniter, a fuel bin, a metering pump, a mixing spray pipe, a combustion gas exhaust pipeline, a combustion gas recovery fan, a controller, a first cooler, a second cooler, a temperature sensor and a dust remover;
the igniter is arranged at the bottom of the combustion furnace, the first cooler is arranged at the upper part of the combustion furnace, and the temperature sensor is arranged in the combustion furnace;
the mixing spray pipe is introduced into an igniter inside the combustion furnace, the mixing spray pipe is externally connected with the atmosphere, and the fuel bin is connected to the mixing spray pipe through a metering pump;
the top of the combustion furnace is communicated with a combustion gas exhaust pipeline, the combustion gas exhaust pipeline is communicated with an inlet of a dust remover, an outlet of the dust remover is connected with an inlet of a second cooler, and an outlet of the second cooler is connected with a combustion gas recovery fan;
the temperature sensor, the metering pump, the combustion gas recovery fan and the igniter are controlled by the controller to operate.
2. N according to claim 1 2 、CO 2 The production device of the mixed gas is characterized in that: the lower part of the combustion furnace is also communicated with an air return pipeline, the air return pipeline is provided with a combustion gas one-way feedback fan, and the far end of the air return pipeline is communicated with the combustion gas recovery fan.
3. N according to claim 1 or 2 2 、CO 2 The production device of the mixed gas is characterized in that: and an oxygen concentration sensor is installed on the combustion gas exhaust pipeline and connected with a controller.
4. N according to claim 3 2 、CO 2 The production device of the mixed gas is characterized in that: and a cooling water jacket is surrounded outside the combustion furnace.
5. N according to claim 4 2 、CO 2 The production device of the mixed gas is characterized in that: the dust remover is a cyclone dust remover.
6. N according to claim 5 2 、CO 2 The production device of the mixed gas is characterized in that: the first cooler is a cooling water tray distributed in a multi-pipe shape.
7. N according to claim 6 2 、CO 2 The production device of the mixed gas is characterized in that: the second cooler is an air-cooled heat exchanger or a spray cooler and comprises cooling pipelines and radiating fins which are distributed in a multi-pipe shape.
8. N according to claim 7 2 、CO 2 The production device of the mixed gas is characterized in that: the number of the temperature sensors is at least two.
9. N according to claim 8 2 、CO 2 The production device of the mixed gas is characterized in that: the fuel in the fuel bin is coke powder or carbon powder.
10. N according to claim 9 2 、CO 2 The production device of the mixed gas is characterized in that: and a calcium carbonate desulfurizing agent bin communicated with the fuel bin is also arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222800061.9U CN218579657U (en) | 2022-10-24 | 2022-10-24 | Production device of N2 and CO2 mixed gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222800061.9U CN218579657U (en) | 2022-10-24 | 2022-10-24 | Production device of N2 and CO2 mixed gas |
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| Publication Number | Publication Date |
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| CN218579657U true CN218579657U (en) | 2023-03-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222800061.9U Active CN218579657U (en) | 2022-10-24 | 2022-10-24 | Production device of N2 and CO2 mixed gas |
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| CN (1) | CN218579657U (en) |
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